e-Cigarettes vs Cigarettes Index

e-cigarettes are replaceable or refillable cartridges or containers that are smoke-able and hold a liquid that contains solvents, flavors, and nicotine. Each e-cigarettes hold enough fluid for about 250 puffs (depending on the cartridge). The safety of e-cigarettes is unknown. The effects of the secondhand vapor expelled by e-cigarettes is not known.